OrmLite Stored Procedure Usage

The Raw SQL APIs provide a convenient way for mapping results of any Custom SQL like executing Stored Procedures:

List<Poco> results = db.SqlList<Poco>("EXEC GetAnalyticsForWeek 1");
List<Poco> results = db.SqlList<Poco>(
    "EXEC GetAnalyticsForWeek @weekNo", new { weekNo = 1 });

List<int> results = db.SqlList<int>("EXEC GetTotalsForWeek 1");
List<int> results = db.SqlList<int>(
    "EXEC GetTotalsForWeek @weekNo", new { weekNo = 1 });

int result = db.SqlScalar<int>("SELECT 10");

SqlList with Out Params​

IDbDataParameter pTotal = null;
var results = await db.SqlListAsync<LetterFrequency>("spSearchLetters",
    cmd => {
        cmd.CommandType = CommandType.StoredProcedure;
        cmd.AddParam("pLetter", "C");
        pTotal = cmd.AddParam("pTotal", direction: ParameterDirection.Output);
    });

Custom Results with SqlProc​

ConvertToList should be used to read the results into the matching resultset, e.g. tabular or a single column of values:

using var cmd = db.SqlProc("spSearchLetters", new { pLetter = "C" }));

var rows = await cmd.ConvertToList<LetterFrequency>();
var ints = await cmd.ConvertToList<int>();

Stored Procedures with output params​

The SqlProc API provides even greater customization by letting you modify the underlying ADO.NET Stored Procedure call by returning a prepared IDbCommand allowing for advanced customization like setting and retrieving OUT parameters, e.g:

db.ExecuteSql(@"DROP PROCEDURE IF EXISTS spSearchLetters;
    CREATE PROCEDURE spSearchLetters (IN pLetter varchar(10), OUT pTotal int)
    BEGIN
        SELECT COUNT(*) FROM LetterFrequency WHERE Letter = pLetter INTO pTotal;
        SELECT * FROM LetterFrequency WHERE Letter = pLetter;
    END");

using var cmd = db.SqlProc("spSearchLetters", new { pLetter = "C" });
var pTotal = cmd.AddParam("pTotal", direction: ParameterDirection.Output);

var results = cmd.ConvertToList<LetterFrequency>();
var total = pTotal.Value;

An alternative approach is to use SqlList which lets you use a filter to customize a Stored Procedure or any other command type, e.g:

IDbDataParameter pTotal = null;
var results = db.SqlList<LetterFrequency>("spSearchLetters", cmd => {
        cmd.CommandType = CommandType.StoredProcedure;
        cmd.AddParam("pLetter", "C");
        pTotal = cmd.AddParam("pTotal", direction: ParameterDirection.Output);
    });
var total = pTotal.Value;

More examples can be found in:

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